| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "ax_unique_id.h" |
| |
| #include <memory> |
| |
| #include "gtest/gtest.h" |
| |
| namespace ui { |
| |
| TEST(AXPlatformUniqueIdTest, IdsAreUnique) { |
| AXUniqueId id1, id2; |
| EXPECT_FALSE(id1 == id2); |
| EXPECT_GT(id2.Get(), id1.Get()); |
| } |
| |
| static const int32_t kMaxId = 100; |
| |
| class AXTestSmallBankUniqueId : public AXUniqueId { |
| public: |
| AXTestSmallBankUniqueId(); |
| ~AXTestSmallBankUniqueId() override; |
| |
| private: |
| friend class AXUniqueId; |
| BASE_DISALLOW_COPY_AND_ASSIGN(AXTestSmallBankUniqueId); |
| }; |
| |
| AXTestSmallBankUniqueId::AXTestSmallBankUniqueId() : AXUniqueId(kMaxId) {} |
| AXTestSmallBankUniqueId::~AXTestSmallBankUniqueId() = default; |
| |
| TEST(AXPlatformUniqueIdTest, UnassignedIdsAreReused) { |
| // Create a bank of ids that uses up all available ids. |
| // Then remove an id and replace with a new one. Since it's the only |
| // slot available, the id will end up having the same value, rather than |
| // starting over at 1. |
| std::unique_ptr<AXTestSmallBankUniqueId> ids[kMaxId]; |
| |
| for (int i = 0; i < kMaxId; i++) { |
| ids[i] = std::make_unique<AXTestSmallBankUniqueId>(); |
| } |
| |
| static int kIdToReplace = 10; |
| int32_t expected_id = ids[kIdToReplace]->Get(); |
| |
| // Delete one of the ids and replace with a new one. |
| ids[kIdToReplace] = nullptr; |
| ids[kIdToReplace] = std::make_unique<AXTestSmallBankUniqueId>(); |
| |
| // Expect that the original Id gets reused. |
| EXPECT_EQ(ids[kIdToReplace]->Get(), expected_id); |
| } |
| |
| TEST(AXPlatformUniqueIdTest, DoesCreateCorrectId) { |
| int kLargerThanMaxId = kMaxId * 2; |
| std::unique_ptr<AXUniqueId> ids[kLargerThanMaxId]; |
| // Creates and releases to fill up the internal static counter. |
| for (int i = 0; i < kLargerThanMaxId; i++) { |
| ids[i] = std::make_unique<AXUniqueId>(); |
| } |
| for (int i = 0; i < kLargerThanMaxId; i++) { |
| ids[i].reset(nullptr); |
| } |
| // Creates an unique id whose max value is less than the internal |
| // static counter. |
| std::unique_ptr<AXTestSmallBankUniqueId> unique_id = |
| std::make_unique<AXTestSmallBankUniqueId>(); |
| |
| EXPECT_LE(unique_id->Get(), kMaxId); |
| } |
| |
| } // namespace ui |